无法从servlet获取传递的数据 [英] unable to get the passed data from servlet
问题描述
我正在编写一个与常规jsp-servlet交互正常运行的程序.但是，当我使用ajasx提交相同内容时，它不能正常工作.下面是我的代码.
I'm writing a program that is working fine with the regular jsp-servlet interaction. But when I submit the same with ajasx, it is not working fine. Below is my code.
JSP-Servlet(不含Ajax)
index.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form name="f1" id="f1" method="post" action="Controller">
<input type="text" name="name1" id="name1" /> <input type="submit" />
</form>
</body>
</html>
控制器
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String nsme = request.getParameter("name1");
request.setAttribute("name", nsme);
request.getRequestDispatcher("index1.jsp").forward(request, response);
}
index1.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<input type="text" value="${name}" />
</body>
</html>
使用Ajax
With Ajax
index.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
<script type="text/javascript"
src="http://code.jquery.com/jquery-1.10.0.min.js"></script>
</head>
<body>
<form name="f1" id="f1">
<input type="text" name="name1" id="name1" /> <input type="submit"
name="x" id="x" />
</form>
<script type="text/javascript" src="SampleJS.js"></script>
</body>
</html>
SampleJS.js
$('#x').click(function() {
$.ajax({
type : 'POST',
url : 'Controller',
success : function(data) {
console.log(data)
},
});
});
控制器
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String nsme = request.getParameter("name1");
request.setAttribute("name", nsme);
request.getRequestDispatcher("index1.jsp").forward(request, response);
}
index1.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<input type="text" value="${name}" />
</body>
</html>
在这里，当我使用第一种方法时，名称将正确打印.当我将其与AJAX结合使用时，令我惊讶的是，文本框中未打印任何内容.
Here when I use the first method, The name is printed correctly. When I use it with AJAX, to my surprise nothing gets printed in the textbox.
基本上，我们使用request.getRequestDispatcher("GetCaseData.jsp").forward(request, response);转到另一页.在我的情况下，它有什么替代方案?
请让我知道我要去哪里错了，我该如何解决.
Basically, We use request.getRequestDispatcher("GetCaseData.jsp").forward(request, response); to go to another page. What would be the alternative of it in my case?
please let me know where am I going wrong and how can I fix this.
推荐答案
在Ajax情况下，您不发送任何表单数据.使用$.serialize序列化表单数据并将其发送到服务器:
In the Ajax case you don't send any form data. Use $.serialize to serialize the form data and send it to the server:
$('#x').click(function() {
var formData = $("#f1").serialize();
$.ajax({
type : 'POST',
url : 'Controller',
data : formData,
success : function(data) {
console.log(data)
},
});
});
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